STACKABLE CASTING SINKER
A number of stackable weights can be bundled together and secured with a lashing to form a modular sinker of a desired weight. Each stackable weight has an elongated bar bounded by four side surfaces and having a fixed eye. A link member is movably attached to the fixed eye and terminates in a coupling eye. The link member provides a degree of motion between the coupling eye and the fixed eye of the bar, allowing the coupling eyes of multiple stackable weights to be connected together to a single fastener while the bars are positioned together in a side-by-side relationship. When so connected, the link members form a pyramid-shaped coupling structure that will reduce the likelihood of snagging the resulting modular sinker. The bars preferably have textured side surfaces to frictionally engage each other to maintain the bars parallel and to retain an elastic band that provides the lashing.
The present invention relates to sinkers employed to hold a fishing line near the bottom of a body of water, and more particularly to a modular sinker which allows the user to readily form a sinker of the desired weight while reducing the tendency of the sinker to snag or become entangled by obstructions or weeds.
BACKGROUND OF THE INVENTIONAnglers frequently use a rod to cast a lure or bait attached to a line in order to place the lure or bait at a desired location in the water where the angler hopes to find fish. Typically, one or more sinkers are attached to the line. The sinker serves to provide sufficient weight on the line to flex the rod during the casting action, and provides weight to carry the line against the resistance of air to the desired location. The sinker then serves to maintain the lure or bait in close proximity to the bottom of a body of water.
Unfortunately, sinkers are prone to snagging on weeds, rocks, submerged branches, and similar obstacles. Snagging typically occurs when the fishing line to which the sinker is connected is moved through the water, either when the line is jerked to jump the lure or bait through the water or when reeling in the line after casting. Such snagging may result in breakage of the fishing line and loss of the sinker, and possibly loss of the lure or bait attached to the line. Breakage of the line due to snagging also requires the user to attach a new sinker and possibly a new lure or bait, taking time away from actively fishing.
The problem of loss of expensive lures can be overcome by employing a bait locating device such as taught in U.S. Pat. No. 5,555,668. The '668 bait locating device floats the lure off the bottom with a flotation member, which is connected to a sinker by a separate sinker line. In the event that the sinker does become snagged, the line to the sinker can be broken, allowing recovery of the fishing line and any expensive lure attached thereto. However, the problem of replacing the sinker still remains.
Traditionally, sinkers have been provided in streamlined shapes in an attempt to resist snagging of the sinker; however, such sinkers can still become lodged between rocks or other obstructions. Additionally, the streamlined shape of such sinkers may prevent them from gripping the bottom surface of a body of water to maintain a lure or bait in a desired position when there is a strong current in the water.
Another concern is the frequent need to change the weight of the sinker to suit conditions such as current, lure or bait size, etc. This has classically been done by replacing the sinker on the line with one of a different weight, or by removing or adding one or more sinkers that are crimped onto the fishing line. Simply replacing sinkers may be time consuming, and requires a substantial inventory of different sinker weights to be carried. Crimped-on sinkers may cause undue wear on the line, and the use of multiple sinkers on the line may increase the risk of one or more sinkers becoming snagged.
In an attempt to make weight changes more convenient, sinker devices have been designed that allow the user to readily change the weight, either by adding or removing weight units to a retaining structure or by removing a weight unit and replacing it with one having a different weight.
A rudimentary example of the first approach is taught in U.S. Pat. No. 3,943,654, which teaches a circular strip which attaches to a line and receives a desired number of discarded spark plugs, which serve as weights. The resulting device has numerous protruding elements and thus appears to be highly prone to snagging on obstructions. Furthermore, the resulting sinker would appear to have a large air resistance, which would limit the distance that it can be cast; this problem is exacerbated by the use of spark plugs, which have a relatively low density compared to conventional sinker materials, for the weight units. A more refined device is taught in U.S. Pat. No. 2,863,253, where a weight attaches to the line and additional weights can be threadably attached in series. The resulting sinker is more compact and lacks the protrusions of the '654 sinker, but the threads employed to attach the weights together may be prone to damage or wear by impacts, grit, and/or corrosion. The threaded connections may also make the weights of the '253 sinker expensive to fabricate. U.S. Pat. No. 2,589,715 teaches a trolling sinker having a shaft on which weight units can be slid, these weight units being retained by blocks that are affixed to the shaft by set screws. The use of set screws complicates the process of changing the weight, and may be difficult to accomplish with wet and/or cold hands, as the angler would need to manipulate small objects to loosen and re-tighten the set screws. U.S. Pat. Nos. 1,858,550 and 2,600,002 teach sinkers having streamlined capsules in which a desired number of balls are placed to adjust the weight. Again, the requirement that the user manipulate several small objects to change the weight may make adjustment of the weight difficult in actual angling conditions. Furthermore, the streamlined capsules would appear to provide relatively little ability to grip the bottom surface, limiting their suitability in conditions where a strong current is present.
The second approach to varying the sinker weight, using a single replaceable weight, is taught in U.S. Pat. Nos. 3,648,398 and 5,461,821. These patents teach sinkers that have a weight held in a resilient tube, to which the line is attached. The weight of the sinker can be readily changed by pulling the weight from the tubing and substituting a different weight. However, these devices appear to be limited in the amount of weight that can be employed in the sinker, since a relatively large weight would require the weight to be excessively long. Such a long, rigid weight may be difficult to cast, may be more prone to snagging, and may provide limited ability to grip the bottom surface. Also, an excessively long weight is difficult to store conveniently. Since the weight is intended to be squeezed out of the tube in the event that the weight becomes jammed by obstructions, it appears that it may be difficult to attaining the right degree of friction between the weight and the tubing such that the weight will not fall out of the tubing when casting, but will slip out of the tubing if it becomes jammed.
SUMMARY OF THE INVENTIONThe present invention provides a stackable weight designed to be used as a building element for an adjustable-weight modular sinker, as well as the resulting sinker, which is particularly well suited for casting. The stackable weight is configured to be bundled with additional, similar stackable weights and bound together with a lashing to form a composite sinker of the desired weight, the resulting sinker being compact and attaching to the fishing line in such a manner as to reduce the likelihood of becoming snagged.
Each stackable weight has an elongated bar terminating in a leading end and a trailing end, and bounded by four side surfaces which provide a rectangular cross section. Each of the stackable weights has a fixed eye attached to the leading end of the elongated bar. A link member movably attaches to the fixed eye and terminates in a coupling eye, the movable attachment of the link member to the fixed eye serving to provide a degree of motion between the coupling eye the elongated bar. This motion allows the coupling eyes to be connected together to a single fastener when the elongated bars are stacked in a side-by-side relationship with their leading ends positioned together. When the coupling eyes are connected together in this manner, the link members form triangular-shaped coupling units that, when connected together, form a pyramid-like structure that will reduce the likelihood of snagging by providing flexible ramp surfaces that can ride over blocking obstructions such as rocks and weed tangles that could otherwise catch on the leading ends of the elongated bars. Preferably, the leading ends of the elongated bars are tapered to further reduce the likelihood of snagging.
A lashing, such as an elastic band, is provided to complete the sinker. The lashing binds the stacked weights, thus forming a bundle of the stackable weights positioned in a side-by-side relationship, with their link members arranged to be connected to a single, common fastener. This bundle of weights forms the resulting sinker, wherein the stackable weights can be readily added or removed without requiring special tools while still maintaining a compact sinker well suited for casting. Connecting the link members to a single fastener not only provides a snag-resistant structure, as pointed out above, but also provides connectivity of the weights in service even in the event that the lashing breaks.
The side surfaces of the elongated bars are preferably textured to increase sliding resistance between side surfaces of adjacent elongated bars, and between the elongated bars and the lashing without requiring special connecting elements that may complicate assemby of the desired weight size in the field while fishing. The increased friction between the side surfaces of adjacent elongated bars helps maintain the elongated bars aligned, and allows the use of a single elastic band for the lashing. The friction between the side surfaces and the lashing reduces the likelihood of the lashing slipping off the elongated bars due to rubbing against rocks or other submerged objects. The textured surfaces, in combination with the substantially rectangular cross section, may also help the stackable weights to stay in place on the water bottom to maintain the lure or bait at a desired location until deliberately moved by tension applied to the line by the angler. Such textured side surfaces can be provided by scoring, stamping, or pressing the side surfaces. When the elongated bars are formed of lead, pressing a texture pattern having strong diagonal elements into the side surfaces has been found to provide increased stiffness for the elongated bars.
The elongated bar 14 terminates in a leading end 22, to which the fixed eye 16 attaches, and a trailing end 24. Preferably, the fixed eye 16 is embedded in or forms an integral part of the leading end 22. The elongated bar 14 has a rectangular cross section 26 formed by four substantially planar side surfaces 28. The elongated bar 14 should be formed from a dense, durable material, and typically will be made of metal. Examples of preferred metals are lead, tin, and alloys thereof.
The link member 18 of this embodiment is formed from a length of wire stock, having a link shaft 30 terminating at one end in a link eye 32 and at the other end in the coupling eye 20. The link eye 32 is movably connected to the fixed eye 16 of the elongated bar 14, while the coupling eye 20 is free to be connected to a suitable fastener, as shown in
Since the coupling eyes 20 of the stackable weights 10 are movable with respect to their associated elongated bars 14, the coupling eyes 20 can be positioned so as to be connected to a single snap fastener 38, which in turn is attached to a fishing line (not shown). When so connected, the link members 18 form triangular-shaped coupling units that, when connected together, form a pyramid-like coupling structure 40 for connecting the elongated bars 14 to the snap fastener 38. The coupling structure 40 serves to provide slightly flexible ramp surfaces, formed by the link members 18, that will tend to assist the modular sinker 12 in sliding past obstructions. Further resistance to becoming snagged by obstructions can be gained by employing the modular sinker 12 with a bait locating device, such as taught in U.S. Pat. No. 5,555,668, and/or a line shield such as taught in the co-pending application Ser. No. 11/828,414 of the present inventor entitled “Snag-Resistant Sinker Line Shield”. The attachment of such a line shield is illustrated in the embodiment shown in
Again, the elongated bar 106 of the stackable weight 100 has a fixed eye 110 affixed to a leading end 112. The link member 102 has a link eye 114, which is movably connected to the fixed eye 110; however, rather than having a link shaft, the link member 102 is formed from a conventional barrel swivel. The link member 102 has a barrel 116 which movably connects a link eye shaft 118, on which the link eye 114 is provided, to a coupling eye shaft 120, on which the coupling eye 104 is provided. In addition to letting the coupling eye 104 rotate with respect to the link eye 114, the barrel 116 allows a small degree of inclination between the link eye shaft 118 and the coupling eye shaft 120, thereby providing a greater range of movement for the coupling eye 104.
When a desired number of the stackable weights 100 are bundled together to form a modular sinker 128, as shown in
Again, since the coupling eyes 104 each have a degree of motion relative to their associated elongated bar 106, the coupling eyes 104 can be connected to a common fastener, such as a snap swivel 132, while the elongated bars 106 remain parallel to each other in a side-by-side relationship. When the coupling eyes 104 of a number of the stackable weights 100 are attached together to form the modular sinker 128, the link members 102 form a substantially triangular coupling structure, which is quasi-conical or quasi-pyramidal. This coupling structure provides a tapered or ramped profile to obstructions and weeds, which should resist snagging of the modular sinker 128, and has some degree of flexibility to allow it to better work around obstructions.
Since the elongated bars 106 are maintained parallel to each other and each have a rectangular cross section, the resulting cross section of the modular sinker 128 can be considered substantially rectangular or quasi-rectangular, and will have a cross section with relatively little empty space to provide the modular sinker 128 with enhanced anchoring ability.
When the stackable weights (10, 100) are provided in differing weights, they allow the user to configure a modular weight to best suit the fishing conditions. For example, when a four ounce weight is needed, such could be provided by bundling together four stackable weights that each weighs one ounce, or by bundling two stackable weights that each weighs two ounces. In the first case, the resulting modular sinker will have a more compact profile, and will tend to provide a better anchoring effect when fishing on a sand or gravel bottom surface. In the latter case, the resulting modular sinker will have an elongated, more streamlined profile, which will be less susceptible to becoming snagged on rocks or weeds. In either case, the bundled stackable weights provide the modular sinker of the present invention with a relatively small wind resistance, allowing the modular sinker to be cast further than a collection of individual weights attached to the line.
While the novel features of the present invention have been described in terms of particular embodiments and preferred applications, it should be appreciated by one skilled in the art that substitution of materials and modification of details obviously can be made without departing from the spirit of the invention.
Claims
1. A stackable weight for forming a modular sinker, the weight comprising:
- an elongated bar terminating at a leading end and a trailing end, said elongated bar having a substantially rectangular cross section;
- a fixed eye attaching to said leading end of said bar; and
- a link member movably attaching to said fixed eye and terminating in a coupling eye, said link member providing mobility of said coupling eye with respect to said bar.
2. The stackable weight of claim 1 wherein said elongated bar has textured sides.
3. The stackable weight of claim 2 wherein said textured sides are formed by pressing.
4. The stackable weight of claim 2 wherein said link member further comprises:
- a barrel swivel.
5. The stackable weight of claim 4 wherein said leading end of said bar is tapered.
6. A modular sinker comprising:
- a first weight having, a first elongated bar terminating at a first bar leading end and a first bar trailing end, said first elongated bar having a substantially rectangular cross section, a first bar fixed eye attaching to said first bar leading end of said first elongated bar, and a first link member movably attaching to said first bar fixed eye and terminating in a first coupling eye, said first link member providing mobility of said first coupling eye with respect to said first bar;
- a second weight having, a second elongated bar terminating at a second bar leading end and a second bar trailing end, said second elongated bar having a substantially rectangular cross section, a second bar fixed eye attaching to said second bar leading end of said second elongated bar, and a second link member movably attaching to said second bar fixed eye and terminating in a second coupling eye, said second link member providing mobility of said second coupling eye with respect to said second bar;
- a lashing securing said first elongated bar and said second elongated bar together in a side-by-side relationship; and
- a common fastener connecting to said coupling eyes, said first and second link members forming a substantially pyramid-shaped coupling structure when said first and second coupling eyes are connected to said common fastener.
7. The modular sinker of claim 6 wherein said lashing further comprises:
- an elastic band that encircles said first elongated bar and said second elongated bar.
8. The modular sinker of claim 7 wherein said first bar leading end and said second bar leading end are tapered.
9. The modular sinker of claim 8 wherein said first elongated bar and said second elongated bar each further comprises:
- textured side surfaces.
10. The stackable weight of claim 1 wherein said link member further comprises:
- a barrel swivel.
11. The stackable weight of claim 1 wherein said leading end of said bar is tapered.
12. The stackable weight of claim 2 wherein said textured sides provide a pattern of diagonal ridges on said elongated bar.
13. The modular sinker of claim 7 wherein said first link member and said second link member are provided by barrel swivels.
14. The modular sinker of claim 9 wherein said textured side surfaces provide a pattern of diagonal ridges on each of said first elongated bar and said second elongated bar.
Type: Application
Filed: Jul 26, 2007
Publication Date: Oct 16, 2008
Patent Grant number: 7621072
Inventor: Bernard P. Brasseur (Cornish, NH)
Application Number: 11/828,421
International Classification: A01K 95/00 (20060101);